ISO Metric
GR5 Titanium Bolts M6*25mm Umbrella Flange Head Torx
- Grade: Grade 5 (Ti-6Al-4V)
- Thread Drive: Inner Plum / Torx T30
- Key Application: Aerodynamic Fairings
2011EST
Founded in Baoji China
895MPa
Min. GR5 Tensile Strength
≤1HR
Technical Inquiry Lead Time
44%
Weight Cut vs. Alloy Steel
Engineered Solutions
Verified Precision Titanium Fastener Lineup
Precision-ground concentricity, cold-headed Torx/Hex configurations, and rolled threads adhering to ISO 10642, DIN 7991, and custom OEM prints.
High Clamping
M6*12 Titanium Allen Hex Bolts Umbrella Screws
- Grade: Certified GR5 B348
- Head Profile: Umbrella Low-Drag Dome
- Key Application: Bicycle Chassis Mounting
CNC Machined
OEM Precision CNC Machined Slotted Hex Screw
- Tolerance: ±0.01mm Precision Runout
- Design: Slotted Hex Dual Hybrid
- Key Application: Instrumentation Assemblies
PVD Nitride
GR5 Titanium M10*30mm Golden Cylinder Head Bolts
- Finish: PVD Hard Gold Nitride
- Standard: DIN 912 Heavy-Duty Grade
- Key Application: High-Tension Caliper Hubs
Ultralight
GR5 Titanium M6*70mm Button Head Hex Socket Screws
- Length: 70mm Extended Shank
- Geometry: Button Head Low Silhouette
- Key Application: Composite Deck Fastening
High Yield
GR5 Titanium M10*40mm High Strength Socket Bolts
- Tensile: ≥ 950 MPa Verified
- Surface: Polished Micro-Deburred
- Key Application: Engine Cradle Mounts
Race Lockwire
GR5 Titanium M8*20mm Drilled Hex Flange Bolts
- Feature: Cross-Drilled for Safety Wire
- Flange: Integrated Load Washer Face
- Key Application: Track & Competition Rotors
Kinematic Pin
M8 GR5 Titanium Precision Shoulder Screws
- Tolerance: f7 Ground Shoulder Journal
- Head: Socket Countersink Shoulder
- Key Application: Disc Brake Floating Mounts
Engineering Authority: Sourcing Grade 5 Titanium Countersunk Screws
In aerospace structures, racing suspension linkage, deep-subsea moorings, and ultra-light bicycle frames, fasteners do not merely secure panels; they act as primary load transmitters. Titanium countersunk screws (specifically meeting DIN 7991, ISO 10642, and ASME B18.6.7M standards) are engineered to eliminate boundary layer drag, flush-mount mating surfaces, and prevent shear load accumulation across critical joinery. However, specifying countersunk screws in titanium—particularly Alpha-Beta Grade 5 (Ti-6Al-4V)—demands an acute understanding of metallurgical notch sensitivity, cold-forming dynamics, and shear head angle calibration.
Critical Sourcing Factor: Unlike carbon steel or austenitic stainless steel fasteners, Grade 5 titanium does not possess high ductility at ambient temperatures. Premium China titanium factories employ hot induction heading or high-precision multi-axis CNC turn-milling to form the 90° or 100° countersunk cone angle. This avoids head shear failure, stress corrosion cracking (SCC), and internal grain dislocation common in sub-standard cold-forged screws.
Rolled vs. Cut Thread Microstructure
Navzo utilizes cold roll die threading post-machining. This induces continuous, compressive residual grain flow along the pitch line and root radius, increasing cyclic dynamic fatigue endurance by over 40% compared to machine-cut threads.
Torx Drive vs. Allen Hex Geometry
Flush countersunk heads suffer from shallower drive pockets. We engineer high-depth Inner Torx (T20, T25, T30) socket geometries that prevent cam-out and distribute torque tangentially, allowing high seating torque up to 18 N·m without head stripping.
Electrochemical Passivation & PVD
Raw titanium naturally generates an adherent TiO2 passive film. For high-wear applications, our specialized vacuum PVD (Physical Vapor Deposition) and multi-spectral anodization create thin-film ceramic barriers reducing galling coefficients down to μ=0.12.
Comparative Metallurgical Specifications for High-Performance Procurement
Before issuing procurement contracts for projects requiring precision flat head / countersunk fasteners, mechanical design engineers must contrast core material performance parameters across candidate alloys.
| Alloy & Spec | Density (g/cm³) | Tensile Strength Rm (MPa) | Yield Strength Rp0.2 (MPa) | Shear Resistance (MPa) | Thermal Expansion (×10−6/K) | Corrosion Metric |
|---|---|---|---|---|---|---|
| Navzo GR5 (Ti-6Al-4V) | 4.43 | 950 - 1050 | 880 | 550 | 8.6 | Impervious to Cl− ions & Marine Salt |
| Navzo GR2 Commercially Pure | 4.51 | 380 - 450 | 275 | 290 | 8.9 | Maximum Acid / Chemical Purity |
| Stainless A4-80 (316) | 8.00 | 800 | 600 | 480 | 16.0 | Susceptible to Crevice Attack |
| Alloy Steel 10.9 Plated | 7.85 | 1040 | 940 | 620 | 11.5 | Prone to Hydrogen Embrittlement |
Localized Application Scenarios in Global End-Markets
Titanium countersunk fasteners are non-negotiable components across demanding engineering environments where flush mechanical profiles prevent aerodynamic drag or friction against rotating assemblies:
- Aerospace & Drone Control Surfaces: In advanced UAV and light aviation assemblies, countersunk screws integrate seamlessly into carbon fiber monocoques, wings, and control flaps, completely eliminating turbulence while offering lightning/galvanic protection when paired with specialized anti-corrosion barrier coatings.
- Motorsport Braking & Rotors: On racing motorbikes and formula racecars, rotating mass directly affects unsprung inertia. Countersunk titanium rotor and bracket screws secure floating disc rotors without interfering with the caliper's tight clearances, maintaining structural integrity across thermal spikes exceeding 450°C.
- Marine Robotics & Hydrofoils: Seawater presents extreme chloride stress corrosion threats. Traditional stainless steel screws suffer from localized pitting beneath flat countersunk heads where oxygen is starved. Grade 5 titanium remains utterly immune to marine crevice corrosion across entire 25-year operational lifecycles.
Procurement & Supply Chain Trends: What Industrial Buyers Must Navigate
As global supply networks shift toward verified origin transparency, modern industrial buyers look beyond simple piece-part costs. The following shifts characterize contemporary titanium fastener sourcing:
- Direct Factory Sourcing from Baoji Hub: Intermediaries often introduce unknown sponge stock. Direct partnerships with factories positioned in the High-tech Development Zone of Baoji leverage shortened raw material lead times, guaranteed ASTM B348 Grade 5 certified bar, and direct batch traceability with authentic Mill Test Certificates (MTC EN 10204 3.1).
- Demand for Anti-Galling Thread Geometries: Titanium-on-titanium interfaces are prone to microscopic friction welding (galling). High-tier Chinese manufacturers now integrate thread roll profiles with modified crest radii and proprietary anti-seize micro-coatings (such as MoS2 dry film lubrication or micro-arc oxidation).
- Standardization Toward Precision Hexalobular (Torx): The industry is rapidly abandoning traditional cross-recess (Phillips) and slotted countersunk designs. Torx (DIN 34805-2 / ISO 14581) is now the definitive benchmark for automated assembly lines due to minimal axial insertion force and zero risk of tool slippage.
Why Partner With Us
Navzo Precision: Baoji’s Verified Manufacturing Authority
Founded on January 10, 2011, on Yucai Road in Baoji’s world-renowned High-tech Development Zone ("China Titanium Valley"), Navzo Precision Titanium Products Co., Ltd. is not a generic export agent. We operate an integrated, vertically synchronized manufacturing complex encompassing raw titanium bar processing, Swiss-type 5-axis CNC machining, cold/warm heading, automated thread rolling, and high-vacuum surface conversion.
Upstream Sponge Integration
Direct allocation of 0A-grade certified titanium sponge and high-vacuum VAR melted ingot guarantees nil chemical segregation, low gas interstitial values (O < 0.18%, H < 0.0125%), and flawless metallurgical purity.
Rigorous In-House Metrology
Every fastener batch is checked via Mitutoyo optical profile projectors, 3D coordinate measuring machines (CMM), dynamic torque calibration rigs, and GO/NO-GO thread ring gauges inspected to 6g / 6H precision standards.
Rapid OEM/ODM Prototyping
Send your 2D (PDF, DWG) or 3D (STEP, IGES) CAD files. Our engineering staff delivers full DFM (Design for Manufacturability) feasibility feedback and turnkey prototype batches in as rapid as 5 to 7 operational days.
Procurement Intelligence
Frequently Asked Questions: Global Sourcing & Engineering
Direct, technically verified answers to common questions asked by supply chain managers, metallurgists, and technical procurement directors.
What is the exact countersunk head angle standard used on Navzo titanium screws?
Our standard metric countersunk fasteners conform strictly to ISO 10642 and DIN 7991, featuring a precise 90° conical head angle. For aerospace and US imperial specifications (such as ASME B18.6.7M or NAS standards), we fabricate precision 100° or 82° countersunk cones on demand via multi-axis CNC tooling to ensure absolute coplanar flushness with the countersink hole.
Why is Grade 5 (Ti-6Al-4V) preferred over Grade 2 for countersunk designs?
Countersunk screw heads experience complex combination loading—including radial tension, shear, and notch bending stress at the head-to-shank transition. Commercially pure Grade 2 titanium possesses a tensile strength of roughly 345–450 MPa, which can lead to yielding under heavy pre-load. Grade 5 delivers a minimum tensile strength of 895 MPa and yield strength of 828 MPa, ensuring safe retention under extreme cyclic loading.
How do you mitigate galling when titanium countersunk screws are torqued?
Titanium readily galls against identical materials due to its microscopic friction profile. To combat this, we recommend: (1) Utilizing our physical vapor deposition (PVD) titanium nitride or DLC carbon coatings; (2) Applying a high-grade titanium-compatible anti-seize paste with copper/aluminum microscopic solids; or (3) Pairing titanium screws with our custom anodized aluminum or self-locking titanium 12-point nuts.
What quality verification documentation accompanies each export shipment?
We supply comprehensive quality documentation dossiers, including certified Mill Test Reports (MTR) demonstrating chemical composition (ICP analysis) and mechanical properties (tensile, yield, elongation). Additionally, dimensional inspection reports, plating thickness reports, and salt spray test certificates are provided according to project specifications.
What is your typical production lead time and Minimum Order Quantity (MOQ)?
For catalog sizes (M3 to M12 standard lengths), MOQ starts at a modest 100 to 200 pieces, with warehouse stock dispatch within 48 hours. For non-standard custom lengths, specialized socket geometries, or custom anodized colorways, production runs usually require 10 to 18 business days with an average pilot batch MOQ of 500 units.
Are your countersunk screws compatible with carbon fiber components?
Yes. Titanium is galvanic-compatible with carbon fiber, unlike aluminum or standard zinc-plated carbon steel, which undergo severe galvanic battery corrosion when placed in direct contact with conductive carbon composite matrices. Titanium countersunk screws are the gold standard for composite airframes and hypercar bodyworks.
Ready to Engineer Your Titanium Fastening Strategy?
Connect directly with Navzo’s factory engineering department. Submit your engineering prints, request mill test certifications, or receive immediate volume pricing on all standard and custom titanium countersunk screws.